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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-06-26 to 2018-08-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Version / remarks:
1981
Deviations:
no
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Key result
Percentile:
D10
Mean:
2 µm
St. dev.:
0.01
Remarks on result:
other: Average value
Key result
Percentile:
D50
Mean:
7.5 µm
St. dev.:
0.03
Remarks on result:
other: Average value
Key result
Percentile:
D90
Mean:
18.1 µm
St. dev.:
0.03
Remarks on result:
other: Average value

Table 1: Particle size distribution:

Two test series of 3 measurements each were performed with the test item.  

Test No

D10 [µm]

D50 [µm]

D90 [µm]

 

mean

SD

mean

SD

mean

SD

1

2.0

0.05

7.5

0.12

18.1

0.33

2

2.0

0.03

7.5

0.07

18.1

0.37

Average

2.0

< 0.01

7.5

0.03

18.1

0.03

Conclusions:
The test item has a median particle size D50 = 7.5 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981), ISO 13320 (2009) and CIPAC MT 187.

Description of key information

The test item has a median particle size D50  = 7.5 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981), ISO 13320 (2009) and CIPAC MT 187.

Additional information